guān, guàn
cap
Pictograph of a person (元) wearing a hat (冃). 元 also represents the sound. The 寸 (hand) component was added later to possibly indicate the hat is being held and put onto the head.
Components
Evolution

Oracle script
(~1250-1000 BC)
Seal script
Shuowen (~100 AD)
Clerical script
Eastern Han dynasty (25-220 AD)Regular script
ModernDefinitions
Sources
季旭昇《說文新證》p.612